Malicious PDF — malware analysis report

Static analysis result for SHA-256 b684028fedc9b608…

MALICIOUS

PDF

84.2 KB Created: 2021-07-13 21:29:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6f5676e716ede44ff14ffe39ec828e03 SHA-1: ca2f57cb014287f7a5b7cf1dfb406b9e98376211 SHA-256: b684028fedc9b6082e355e632e19db3d0387090026d9287f05042597525a69fd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of URLs, many pointing to compromised CMS uploads or disposable hosting. This suggests the document is designed to act as a lure, potentially for phishing or to redirect users to download further malicious payloads. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://drafthe.ru/uplcv?utm_term=1+inch+water+column+to+psi PDF link annotation
    • http://coreaad.com/DreamDataUpload/file/19654119563.pdfIn PDF document text
    • http://kasargod.net/uploads/file/51732231572.pdfIn PDF document text
    • http://elfuklid.cz/foto/Image/file/revije.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/gopixivovirulugu.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/6ak7bkns94l04igi63pgbeg2fs/80181147942.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/88a8a87440f143534792bcf5acafdd5e/60289173248.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/fuzigidawejusitefe.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/d350451c7761b9b8ed0c79a22fcdd44a/vidaronikebapaluzopase.pdfIn PDF document text
    • https://searchlink.org/userfiles//file/fovujefuzokunuji.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/76998621025.pdfIn PDF document text
    • https://folklorebridge.eu/uploads/pictures/files/salet.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/b39574dbc1fed32685eae8746b589fb3/958526671.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/b2c349ef36e3201ce8b53477f8cfce67/25515055703.pdfIn PDF document text
    • https://samudra99.com/contents//files/5813375126.pdfIn PDF document text
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/dunofaxisekataxuxa.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/pubbbutu5nohnaj6fmtbvn2v0a/81869591374.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/89109844141.pdfIn PDF document text
    • http://www.dereformasenalicante.com/archivos/files/buvilogimuvarefe.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/sawugunodarizobajub.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160c302e5517fa---zotopasitadepemevukazeme.pdfIn PDF document text
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/notimigikuxosida.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16086bf1b59be8---47320283942.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/d6ou77l5ohj1apvshom9n6ppcf/madukivogarajajakesaw.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E3 16060 bytes
SHA-256: 2c222c0d7f9254d1ef7b60b7add79d8142f83b6513c2cd9d683f1adda22f28c2
font_01_sfnt_off00011137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11137 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001294e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1294E 10780 bytes
SHA-256: a6a0303752de51738c1f10ab6863a388988c445df13833c85f2d66ea0fe6f7ed

Open this report in the interactive analyzer, or submit your own file for analysis.